<script setup>
import {
  getBannerAPI,
  getCategoryAPI,
  getGuessAPI,
  getHotsAPI,
  getNewGoodsAPI,
} from "@/api/home";
import { onLoad } from "@dcloudio/uni-app";
import { ref } from "vue";
import Navbar from "./components/Navbar.vue";

const bannerList = ref([]);
const loadBanner = async () => {
  const res = await getBannerAPI(1);
  bannerList.value = res.result;
};

const category = ref([]);
const loadCategory = async () => {
  const { result } = await getCategoryAPI();
  category.value = result;
};

const hots = ref([]);
const loadHots = async () => {
  const { result } = await getHotsAPI();
  hots.value = result;
};

const newGoods = ref([]);
const loadNews = async () => {
  const { result } = await getNewGoodsAPI();
  newGoods.value = result;
};

const loading = ref(false);
const pages = ref(999);
const page = ref(1);
const guessList = ref([]);
const loadGuess = async () => {
  loading.value = true;
  const { result } = await getGuessAPI(page.value);
  pages.value = result.pages;
  guessList.value.push(...result.items);
  loading.value = false;
};

const loadMore = () => {
  if (page.value >= pages.value) return;
  if (loading.value === true) return;
  page.value++;
  loadGuess();
};

onLoad(() => {
  loadBanner();
  loadCategory();
  loadHots();
  loadNews();
  loadGuess();
});

const trigger = ref(false);
const onFresh = async () => {
  trigger.value = true;
  bannerList.value = [];
  category.value = [];
  newGoods.value = [];
  hots.value = [];
  page.value = 999;
  page.value = 1;
  guessList.value = [];

  // 多个await之间会不会相互阻塞 - 会

  // Promise.all - 不会阻塞
  Promise.all([loadBanner(), loadCategory(), loadHots(), loadNews(), loadGuess()]).then(
    () => {
      trigger.value = false;
    }
  );
};
</script>

<template>
  <view class="content">
    <Navbar />

    <scroll-view
      :refresher-triggered="trigger"
      refresher-enabled
      @refresherrefresh="onFresh"
      class="main"
      scroll-y
      @scrolltolower="loadMore"
    >
      <Carousel :list="bannerList" :height="280" />
      <CateScroll :list="category" />

      <!-- 人气推荐 -->
      <view class="panel recommend">
        <view class="item" v-for="item in hots" :key="item.id">
          <view class="title">
            {{ item.title }}<text>{{ item.alt }}</text>
          </view>
          <!-- 前端路由：查询字符串 ?属性名=值 -->
          <navigator
            hover-class="none"
            :url="`/pages/recommend/index?type=${item.type}`"
            class="cards"
          >
            <image mode="aspectFit" v-for="img in item.pictures" :key="img" :src="img" />
          </navigator>
        </view>
      </view>

      <!-- 新鲜好物 -->
      <view class="panel fresh">
        <view class="title">
          新鲜好物
          <navigator hover-class="none" class="more" url="/pages/recommend/index?type=5"
            >更多</navigator
          >
        </view>
        <view class="cards">
          <navigator
            hover-class="none"
            :url="`/pages/goods/index?id=${item.id}`"
            v-for="item in newGoods"
            :key="item.id"
          >
            <image mode="aspectFit" :src="item.picture"></image>
            <view class="name">{{ item.name }}</view>
            <view class="price"> <text class="small">¥</text>{{ item.price }} </view>
          </navigator>
        </view>
      </view>

      <!-- 热门品牌 -->
      <view class="panel brands">
        <view class="title">
          热门品牌
          <navigator hover-class="none" class="more" url="/pages/list/index"
            >更多</navigator
          >
        </view>
        <view class="cards">
          <navigator hover-class="none" url="/pages/goods/index">
            <image
              mode="aspectFit"
              src="http://static.botue.com/erabbit/static/uploads/brand_logo_1.jpg"
            ></image>
            <view class="name">小米</view>
            <view class="price">99元起</view>
          </navigator>
          <navigator hover-class="none" url="/pages/goods/index">
            <image
              mode="aspectFit"
              src="http://static.botue.com/erabbit/static/uploads/brand_logo_2.jpg"
            ></image>
            <view class="name">TCL</view>
            <view class="price">199起</view>
          </navigator>
          <navigator hover-class="none" url="/pages/goods/index">
            <image
              mode="aspectFit"
              src="http://static.botue.com/erabbit/static/uploads/brand_logo_3.jpg"
            ></image>
            <view class="name">饭小宝</view>
            <view class="price">9.9起</view>
          </navigator>
          <navigator hover-class="none" url="/pages/goods/index">
            <image
              mode="aspectFit"
              src="http://static.botue.com/erabbit/static/uploads/brand_logo_4.jpg"
            ></image>
            <view class="name">鳄鱼</view>
            <view class="price">299起</view>
          </navigator>
        </view>
      </view>

      <!-- 4. 父传子 -->
      <Guess :list="guessList" :finished="page >= pages" />
    </scroll-view>
  </view>
</template>

<style lang="scss" scoped>
.title {
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  padding-left: 20rpx;
}

.content {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.main {
  flex: 1;
  overflow: hidden;
  background-color: #f7f7f8;
}

/* 公共面板 */
.panel {
  margin: 20rpx 20rpx 0;
  border-radius: 10rpx;
  background-color: #fff;

  .title {
    display: flex;
    align-items: center;
    padding: 24rpx 24rpx 0;
    font-size: 32rpx;
    color: #262626;
    position: relative;

    text {
      font-size: 24rpx;
      color: #7f7f7f;
      margin-left: 18rpx;
    }
  }

  .more {
    position: absolute;
    right: 24rpx;
    font-size: 26rpx;
    color: #7f7f7f;
  }

  .cards {
    display: flex;
  }

  .name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

/* 推荐专区 */
.recommend {
  display: flex;
  flex-wrap: wrap;

  .item {
    display: flex;
    flex-direction: column;
    width: 50%;
    height: 254rpx;
    border-right: 1rpx solid #eee;
    border-top: 1rpx solid #eee;

    &:nth-child(2n) {
      border-right: 0 none;
    }

    &:nth-child(-n + 2) {
      border-top: 0 none;
    }
  }

  .cards {
    flex: 1;
    padding: 15rpx 20rpx;
    justify-content: space-between;

    image {
      width: 48%;
    }
  }
}

/* 新鲜好物 */
.fresh {
  min-height: 320rpx;

  .price {
    line-height: 1;
    text-align: left;
    font-size: 26rpx;
    color: #cf4444;
  }

  .small {
    font-size: 80%;
  }
}

.fresh .cards navigator,
.brands .cards navigator {
  width: 25%;
  padding: 15rpx 20rpx 20rpx;
  line-height: 1;
  text-align: center;
}

.fresh image,
.brands image {
  width: 126rpx;
  height: 126rpx;
}

.fresh .name,
.brands .name {
  margin: 20rpx 0 16rpx;
  font-size: 24rpx;
  color: #262626;
}

.brands {
  .price {
    font-size: 24rpx;
    color: #999;
  }
}
</style>
